My error, I used two lenses while there. The third was taken with Tamron 70-300mm macro. With the quality I got with the 18-250mm I will not be as quick to change lenses. The main advantage with the Tamron beside an extra 50mm is a 1/2 Macro capability.

I opted for the Tamron 18-250mm from which the Pentax is 'cloned'. A very versatile lens but wide to near wide open shots require post processing with lens correction to overcome vignetting which occurs across the whole focal length range.

Don't be put off, use RAW and post process in ACR/Lightroom &amp; you'd hardly know there was a problem.

Here's a shot that I'm quite please with using the Tamron 18-250mm - Shutter 1/500S, f-16, ISO 200, 375mm (in 35mm terms) taken with the *istDS